Self-cleaning ore pass grizzly

Abstract

The utility model provides a kind of large ore self-cleaning chute grizzly, including grizzly base, grizzly and driving device;The grizzly is rotatably installed on the grizzly base, and the grizzly has screen hole for screening ore;The driving device is connected between the grizzly base and the grizzly, and the grizzly is rotated to clean the intercepted large ore to the side of chute.The grizzly can automate the process of large ore handling, reduce the equipment downtime caused by traditional manual ramming or breaking hammer intervention, improve the chute mouth transport efficiency;At the same time, personnel only need to remotely control electric push rod, which avoids high-risk operation at the chute mouth and reduces the risk of accidents.

Description

Technical Field

[0001] This utility model belongs to the field of ore processing and conveying technology, specifically a self-cleaning chute screen for large ore blocks. Background Technology

[0002] In mining and ore transfer processes, the ore pass, as a key structure connecting different mining levels or unloading materials from transport equipment, is crucial for efficient and stable operation. During the ore's descent through the ore pass, large pieces can easily cause blockages, known as "stuck hoppers," in narrow sections or at the bottom unloading port. Stuck hoppers not only disrupt the ore transport process, leading to a complete production stoppage, but in severe cases, they can even damage the ore pass structure or downstream equipment, causing significant economic losses and safety risks.

[0003] To effectively prevent ore chute blockage, the industry standard practice has long been to install screen devices at the ore pass entrance. These screens typically consist of a robust metal frame and horizontal and vertical rods, forming screen openings of a specific size. Their core function is to screen the descending ore: small pieces of ore that meet size requirements fall directly into the ore pass through the screen openings, while larger pieces are intercepted on the screen surface. This technology significantly reduces the probability of ore pass blockage, ensuring the continuity and safety of the ore transfer system, and is an indispensable key device in the mining production process.

[0004] However, existing grid screening technology suffers from a significant and long-standing operational bottleneck: how to handle large pieces of ore that are intercepted. For example... Figure 1 As shown, when large pieces of ore accumulate on the screen, they must be crushed or removed; otherwise, they will clog the screen surface, hindering the passage of subsequent ore and ultimately leading to production stoppage. Currently, there are two main processing methods commonly used:

[0005] 1. Manual tamping and crushing: Operators must stand on the screen with a sledgehammer to manually crush large pieces. The chute opening is usually located in the edge area, and the lower part of the screen is the chute cavity. The space is limited and there are complex environments such as slippery surfaces and dust, which are high-risk working environments. Personnel face major safety risks such as falls and falls from heights.

[0006] 2. Mechanical Breaker Intervention: Large blocks are mechanically crushed using hydraulic or pneumatic breakers. While this method is safer and more efficient than manual operation, it requires waiting for the crushing equipment to be deployed. During this time, screen blockage can prevent the chute from operating normally, forcing the loaders operating at the chute opening and related equipment below to shut down, resulting in significant production interruptions and wasted time. Furthermore, breaker operation itself involves certain equipment costs and maintenance requirements.

[0007] Therefore, while existing grid screening technology has solved the core problems of preliminary ore screening and preventing ore chute jamming, it introduces two major drawbacks when handling its own intercepted products—large pieces of ore: high operational safety risks and long downtime for related equipment. These drawbacks directly restrict the operational efficiency of the ore pass and even the entire ore transfer system, increasing production costs and potential safety hazards. Utility Model Content

[0008] The main purpose of this utility model is to provide a self-cleaning chute screen for large ore blocks that avoids high-risk operating environments while minimizing equipment downtime.

[0009] The present invention provides a self-cleaning ore pass screen for large ore blocks, comprising a screen base, a screen, and a driving device; the screen is rotatably mounted on the screen base and has screen holes for screening ore; the driving device is connected between the screen base and the screen and drives the screen to rotate to clear the intercepted large ore blocks to one side of the pass.

[0010] In one embodiment of the above-mentioned grid screen, a displaceable component is further included, which is slidably connected to the grid screen and is used to slide relative to the grid screen to change the size of the screen holes when the grid screen rotates.

[0011] In one embodiment of the above-mentioned grid screen, the displaceable component is a movable grid screen, which has an outwardly extending limiting rod; the grid screen is provided with a transverse mounting hole, and the limiting rod is slidably connected in the transverse mounting hole, restricting the movable grid screen to only be displaced laterally relative to the grid screen.

[0012] In one embodiment of the above-mentioned grid screen, the two limiting rods near the hinge point between the grid screen and the grid screen base are L-shaped limiting rods.

[0013] In one embodiment of the above-mentioned grid screen, a spring is also included; the spring is installed on the L-shaped limiting rod, one end of which abuts against the transverse mounting hole of the grid screen, and the other end abuts against the bottom edge of the L-shaped limiting rod, and drives the movable grid screen to reset when the driving device retracts.

[0014] In one embodiment of the above-mentioned grid screen, the grid screen base and the grid screen are hinged together by an eccentric cam, and the bottom edges of the two L-shaped limiting rods abut against the eccentric cam.

[0015] In one embodiment of the above-mentioned screen, the driving device is an electric push rod.

[0016] In one embodiment of the above-mentioned grid screen, the grid screen base is a hollow rectangular frame, which is installed on the foundation by a fixing component.

[0017] The beneficial effects of this utility model are as follows:

[0018] 1. Benge screen can improve the safety of the process of cleaning large pieces of ore at the ore pass. Personnel only need to remotely control the electric push rod, avoiding high-risk operations at the ore pass and reducing the risk of accidents. At the same time, it reduces the equipment downtime caused by the intervention of traditional manual tamping or hydraulic breakers, and improves the transportation efficiency at the ore pass.

[0019] 2. The electric push rod drives the screen to rotate around the longitudinal mounting hole, pushing large pieces of ore to the side; at the same time, the L-shaped limiting rod is pushed laterally by the longitudinal mounting hole of the eccentric structure, thereby expanding the screen hole size to help loosen large pieces of ore; avoiding the decrease in subsequent work efficiency caused by large pieces of ore getting stuck on the screen.

[0020] 3. When the electric push rod retracts, the spring cooperates to drive the moving screen and the screen automatically returns to its initial closed state without additional operation; this ensures the device resets quickly, maintains continuous screening operation, and reduces unnecessary waiting; the structure is simple and reliable, reducing maintenance frequency and cost, and is suitable for harsh mining environments. Attached Figure Description

[0021] Figure 1 This is a schematic diagram illustrating the usage status of existing technologies.

[0022] Figure 2 This is a top view of a closed state according to an embodiment of the present invention.

[0023] Figure 3 for Figure 2 Side view of the closed state of the medium-sized sieve.

[0024] Figure 4 for Figure 2 Axonometric view of the unfolded state of the medium-sized sieve.

[0025] Figure 5 for Figure 4 Side view of the unfolded state of the medium-sized sieve.

[0026] Figure 6 This is a schematic diagram of the usage state of this embodiment. Detailed Implementation

[0027] The relevant technical solutions will now be clearly and completely described with reference to the accompanying drawings of the embodiments of this utility model. Obviously, the described embodiments are only a part of the embodiments, and not all of the embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model.

[0028] like Figure 2 and Figure 3As shown, the self-cleaning ore chute screen disclosed in this embodiment includes a screen base 1, a screen 2, an electric push rod 3, a movable screen 4, and a spring 5. These components work together to achieve ore screening at the chute opening and automatic cleaning of large pieces on the screen.

[0029] The screen base 1 is a hollow rectangular frame that serves as a support foundation. It is fixed to the foundation with concrete or ground nails to ensure the stable installation of the entire device.

[0030] One end of the screen base 1 is provided with a longitudinal mounting hole.

[0031] The grid screen 2 is a frame structure, which is composed of horizontal and vertical rods connected to each other to form a grid structure with several screen holes. It can screen the ore, allowing the ore that meets the screen hole size to pass through, while blocking and retaining large pieces of ore on the grid screen.

[0032] One end of the grid screen 2 is connected to the grid screen base 1 through a longitudinal mounting hole, so that the grid screen can rotate around the mounting hole.

[0033] like Figure 4 and Figure 5 As shown, the two ends of the electric push rod 3 are respectively connected to the middle of one side of the screen base 1 and the screen 2, and can push the screen to rotate around the longitudinal mounting hole.

[0034] Both sides of the screen 2 are provided with horizontal mounting holes at the upper end. These mounting holes serve as connection points for limiting the movement of the screen 4.

[0035] The movable screen 4 has a frame structure with outwardly extending limiting rods at its four corners. Each limiting rod is slidably connected to the transverse mounting holes of the screen 2, restricting the movable screen to only move laterally relative to the screen.

[0036] Furthermore, the two limiting rods near the hinge between the screen and the screen base of the movable screen 4 are L-shaped limiting rods, and the spring 5 is installed on them; one end of the spring abuts against the transverse mounting hole on the screen 2, and the other end abuts against the bottom edge of the L-shaped limiting rod in the movable screen, pushing both to reset.

[0037] Meanwhile, the longitudinal mounting holes on the screen base 1 are eccentric cam structures, with the bottom edges of the two L-shaped limiting rods abutting against the longitudinal mounting holes. When the screen rotates around the longitudinal mounting holes, the L-shaped limiting rods are pushed laterally by the cams, thereby enlarging the screen openings.

[0038] like Figure 6 As shown, the specific steps when using a standard sieve are as follows:

[0039] A screen is installed over the ore pass, allowing small pieces of ore to fall through while larger pieces are screened out. When it's necessary to remove larger pieces remaining on the screen, an electric actuator extends, pushing the screen to rotate around its longitudinal mounting hole connected to the screen base. At this time, an L-shaped limit rod is pushed laterally by the longitudinal mounting hole, enlarging the screen opening and loosening the larger pieces. The loosened pieces then roll along the rotated screen direction to one side, thus removing the large ore from the screen.

[0040] When the electric push rod retracts, the device returns to its initial closed state under the action of springs and other components, thus enabling the screening of ore to continue.

[0041] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although detailed descriptions have been provided with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A self-cleaning ore chute screen, characterized in that: Includes a screen base, a screen, and a drive unit; The screen is rotatably mounted on the screen base, and the screen has screen holes for screening ore; the drive device is connected between the screen base and the screen, and drives the screen to rotate to clear large pieces of ore that have been intercepted to one side of the ore pass.

2. The self-cleaning ore chute screen as described in claim 1, characterized in that: It also includes a displaceable component, which is slidably connected to the grid screen and is used to slide relative to the grid screen to change the size of the screen openings as the grid screen rotates.

3. The self-cleaning ore chute screen as described in claim 2, characterized in that: The displaceable component is a movable grid screen, which has an outwardly extending limiting rod; the grid screen is provided with a transverse mounting hole, and the limiting rod is slidably connected in the transverse mounting hole, restricting the movable grid screen to only be displaced laterally relative to the grid screen.

4. The self-cleaning ore chute screen as described in claim 3, characterized in that: The two limiting rods near the hinge point between the screen and the screen base are L-shaped.

5. The self-cleaning ore chute screen as described in claim 4, characterized in that: It also includes a spring; the spring is mounted on the L-shaped limiting rod, one end of which abuts against the transverse mounting hole of the screen, and the other end abuts against the bottom edge of the L-shaped limiting rod, and drives the movable screen to reset when the driving device retracts.

6. The self-cleaning ore chute screen as described in claim 4, characterized in that: The screen base and the screen are hinged together by an eccentric cam, and the bottom edges of the two L-shaped limiting rods abut against the eccentric cam.

7. The self-cleaning ore chute screen as described in claim 1, characterized in that: The driving device is an electric push rod.

8. The self-cleaning ore chute screen as described in claim 1, characterized in that: The screen base is a hollow rectangular frame, which is installed on the foundation by fasteners.

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